Apple Seeds OS X Mavericks Preview 3 To Developers

Following the release of the iOS 7 beta 3 this morning, Apple has also released the third preview of OS X 10.9 Mavericks to developers this evening. The new preview comes two weeks after Apple released the second beta for Mavericks.

The new release doesn’t contain any major new features, but focus mostly on bug fixes and performance. In an email to developers, Apple encourage beta testers to: haven’t discovered any major changes in the Mavericks preview 3 yet,

“Take advantage of new features, like APIs that optimize the new energy saving technologies in OS X Mavericks, as well as new AV Kit frameworks, Sprite Kit, Map Kit, and many powerful additions to existing frameworks.

Here are the release notes:

Notes and Known Issues

Installation

Network migration from earlier versions of OS X requires the Migration Update for Snow Leopard, Lion, or Mountain Lion, available from the Mac Dev Center.

Migration from Windows is not supported in Developer Preview 3.

Reinstalling Developer Preview 3 from the Recovery Partition is not supported. Developer Preview 3 can be reinstalled using a Time Machine backup or Target Disk Mode.

iCloud and iCloud Keychain

The Reset Keychain button in Account Details of the iCloud preferences pane is for testing purposes and will not be available in the final release.

First-time iCloud setup may fail. Disabled services may be enabled manually in the iCloud preferences pane.

After upgrading to Developer Preview 3, iCloud Keychain will need to be reenabled in the iCloud preferences pane.